Message-ID: <173457554492.3295736.445579202892214043.b4-ty@google.com>
Date: Wed, 18 Dec 2024 18:40:50 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>, 
	Vitaly Kuznetsov <vkuznets@...hat.com>, Jarkko Sakkinen <jarkko@...nel.org>
Cc: kvm@...r.kernel.org, linux-sgx@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Maxim Levitsky <mlevitsk@...hat.com>, 
	Hou Wenlong <houwenlong.hwl@...group.com>, Xiaoyao Li <xiaoyao.li@...el.com>, 
	Kechen Lu <kechenl@...dia.com>, Oliver Upton <oliver.upton@...ux.dev>, 
	Binbin Wu <binbin.wu@...ux.intel.com>, Yang Weijiang <weijiang.yang@...el.com>, 
	Robert Hoo <robert.hoo.linux@...il.com>
Subject: Re: [PATCH v3 00/57] KVM: x86: CPUID overhaul, fixes, and caching

On Wed, 27 Nov 2024 17:33:27 -0800, Sean Christopherson wrote:
> The super short TL;DR: snapshot all X86_FEATURE_* flags that KVM cares
> about so that all queries against guest capabilities are "fast", e.g. don't
> require manual enabling or judgment calls as to where a feature needs to be
> fast.
> 
> The guest_cpu_cap_* nomenclature follows the existing kvm_cpu_cap_*
> except for a few (maybe just one?) cases where guest cpu_caps need APIs
> that kvm_cpu_caps don't.  In theory, the similar names will make this
> approach more intuitive.
> 
> [...]

Applied to kvm-x86 misc, thanks!

[01/57] KVM: x86: Use feature_bit() to clear CONSTANT_TSC when emulating CPUID
        https://github.com/kvm-x86/linux/commit/ccf4c1d15d5a
[02/57] KVM: x86: Limit use of F() and SF() to kvm_cpu_cap_{mask,init_kvm_defined}()
        https://github.com/kvm-x86/linux/commit/4b027f5af907
[03/57] KVM: x86: Do all post-set CPUID processing during vCPU creation
        https://github.com/kvm-x86/linux/commit/85e5ba83c016
[04/57] KVM: x86: Explicitly do runtime CPUID updates "after" initial setup
        https://github.com/kvm-x86/linux/commit/ec3d4440b2c8
[05/57] KVM: x86: Account for KVM-reserved CR4 bits when passing through CR4 on VMX
        https://github.com/kvm-x86/linux/commit/7520a53b8e0a
[06/57] KVM: selftests: Update x86's set_sregs_test to match KVM's CPUID enforcement
        https://github.com/kvm-x86/linux/commit/bf4dfc3aa875
[07/57] KVM: selftests: Assert that vcpu->cpuid is non-NULL when getting CPUID entries
        https://github.com/kvm-x86/linux/commit/08833719e770
[08/57] KVM: selftests: Refresh vCPU CPUID cache in __vcpu_get_cpuid_entry()
        https://github.com/kvm-x86/linux/commit/a2a791e82086
[09/57] KVM: selftests: Verify KVM stuffs runtime CPUID OS bits on CR4 writes
        https://github.com/kvm-x86/linux/commit/01bcd829c63f
[10/57] KVM: x86: Move __kvm_is_valid_cr4() definition to x86.h
        https://github.com/kvm-x86/linux/commit/b0c3d6871778
[11/57] KVM: x86/pmu: Drop now-redundant refresh() during init()
        https://github.com/kvm-x86/linux/commit/ac32cbd4dfc6
[12/57] KVM: x86: Drop now-redundant MAXPHYADDR and GPA rsvd bits from vCPU creation
        https://github.com/kvm-x86/linux/commit/21d7f06d1a83
[13/57] KVM: x86: Disallow KVM_CAP_X86_DISABLE_EXITS after vCPU creation
        https://github.com/kvm-x86/linux/commit/04cd8f8628d8
[14/57] KVM: x86: Reject disabling of MWAIT/HLT interception when not allowed
        https://github.com/kvm-x86/linux/commit/c829ccd4d9dc
[15/57] KVM: x86: Drop the now unused KVM_X86_DISABLE_VALID_EXITS
        https://github.com/kvm-x86/linux/commit/af5366bea2cb
[16/57] KVM: selftests: Fix a bad TEST_REQUIRE() in x86's KVM PV test
        https://github.com/kvm-x86/linux/commit/7b2658cb33c7
[17/57] KVM: selftests: Update x86's KVM PV test to match KVM's disabling exits behavior
        https://github.com/kvm-x86/linux/commit/59cb3acdb316
[18/57] KVM: x86: Zero out PV features cache when the CPUID leaf is not present
        https://github.com/kvm-x86/linux/commit/01d1059d635a
[19/57] KVM: x86: Don't update PV features caches when enabling enforcement capability
        https://github.com/kvm-x86/linux/commit/f21958e328a9
[20/57] KVM: x86: Do reverse CPUID sanity checks in __feature_leaf()
        https://github.com/kvm-x86/linux/commit/6416b0fb1660
[21/57] KVM: x86: Account for max supported CPUID leaf when getting raw host CPUID
        https://github.com/kvm-x86/linux/commit/96cbc766baf0
[22/57] KVM: x86: Unpack F() CPUID feature flag macros to one flag per line of code
        https://github.com/kvm-x86/linux/commit/ccf93de484a3
[23/57] KVM: x86: Rename kvm_cpu_cap_mask() to kvm_cpu_cap_init()
        https://github.com/kvm-x86/linux/commit/3cc359ca29ad
[24/57] KVM: x86: Add a macro to init CPUID features that are 64-bit only
        https://github.com/kvm-x86/linux/commit/6eac4d99a967
[25/57] KVM: x86: Add a macro to precisely handle aliased 0x1.EDX CPUID features
        https://github.com/kvm-x86/linux/commit/264969b48a29
[26/57] KVM: x86: Handle kernel- and KVM-defined CPUID words in a single helper
        https://github.com/kvm-x86/linux/commit/46505c0f69f9
[27/57] KVM: x86: #undef SPEC_CTRL_SSBD in cpuid.c to avoid macro collisions
        https://github.com/kvm-x86/linux/commit/8d862c270bf1
[28/57] KVM: x86: Harden CPU capabilities processing against out-of-scope features
        https://github.com/kvm-x86/linux/commit/3d142340d717
[29/57] KVM: x86: Add a macro to init CPUID features that ignore host kernel support
        https://github.com/kvm-x86/linux/commit/5c8de4b3a5bc
[30/57] KVM: x86: Add a macro to init CPUID features that KVM emulates in software
        https://github.com/kvm-x86/linux/commit/6174004ebd25
[31/57] KVM: x86: Swap incoming guest CPUID into vCPU before massaging in KVM_SET_CPUID2
        https://github.com/kvm-x86/linux/commit/8c01290bda1a
[32/57] KVM: x86: Clear PV_UNHALT for !HLT-exiting only when userspace sets CPUID
        https://github.com/kvm-x86/linux/commit/63d8c702c2d4
[33/57] KVM: x86: Remove unnecessary caching of KVM's PV CPUID base
        https://github.com/kvm-x86/linux/commit/a5b32718081e
[34/57] KVM: x86: Always operate on kvm_vcpu data in cpuid_entry2_find()
        https://github.com/kvm-x86/linux/commit/285185f8e479
[35/57] KVM: x86: Move kvm_find_cpuid_entry{,_index}() up near cpuid_entry2_find()
        https://github.com/kvm-x86/linux/commit/8b30cb367c46
[36/57] KVM: x86: Remove all direct usage of cpuid_entry2_find()
        https://github.com/kvm-x86/linux/commit/136d605b4365
[37/57] KVM: x86: Advertise TSC_DEADLINE_TIMER in KVM_GET_SUPPORTED_CPUID
        https://github.com/kvm-x86/linux/commit/9be4ec35d668
[38/57] KVM: x86: Advertise HYPERVISOR in KVM_GET_SUPPORTED_CPUID
        https://github.com/kvm-x86/linux/commit/9aa470f5ddb2
[39/57] KVM: x86: Rename "governed features" helpers to use "guest_cpu_cap"
        https://github.com/kvm-x86/linux/commit/2c5e168e5ce1
[40/57] KVM: x86: Replace guts of "governed" features with comprehensive cpu_caps
        https://github.com/kvm-x86/linux/commit/7ea34578aea7
[41/57] KVM: x86: Initialize guest cpu_caps based on guest CPUID
        https://github.com/kvm-x86/linux/commit/a7a308f863a1
[42/57] KVM: x86: Extract code for generating per-entry emulated CPUID information
        https://github.com/kvm-x86/linux/commit/ff402f56e8eb
[43/57] KVM: x86: Treat MONTIOR/MWAIT as a "partially emulated" feature
        https://github.com/kvm-x86/linux/commit/d4b9ff3d55de
[44/57] KVM: x86: Initialize guest cpu_caps based on KVM support
        https://github.com/kvm-x86/linux/commit/e592ec657d84
[45/57] KVM: x86: Avoid double CPUID lookup when updating MWAIT at runtime
        https://github.com/kvm-x86/linux/commit/963180ae0637
[46/57] KVM: x86: Drop unnecessary check that cpuid_entry2_find() returns right leaf
        https://github.com/kvm-x86/linux/commit/cfd157452609
[47/57] KVM: x86: Update OS{XSAVE,PKE} bits in guest CPUID irrespective of host support
        https://github.com/kvm-x86/linux/commit/1f66590d7ff0
[48/57] KVM: x86: Update guest cpu_caps at runtime for dynamic CPUID-based features
        https://github.com/kvm-x86/linux/commit/75d4642fce01
[49/57] KVM: x86: Shuffle code to prepare for dropping guest_cpuid_has()
        https://github.com/kvm-x86/linux/commit/820545bdfeb0
[50/57] KVM: x86: Replace (almost) all guest CPUID feature queries with cpu_caps
        https://github.com/kvm-x86/linux/commit/8f2a27752e80
[51/57] KVM: x86: Drop superfluous host XSAVE check when adjusting guest XSAVES caps
        https://github.com/kvm-x86/linux/commit/cbdeea032bfe
[52/57] KVM: x86: Add a macro for features that are synthesized into boot_cpu_data
        https://github.com/kvm-x86/linux/commit/75c489e12d4b
[53/57] KVM: x86: Pull CPUID capabilities from boot_cpu_data only as needed
        https://github.com/kvm-x86/linux/commit/3fd55b522795
[54/57] KVM: x86: Rename "SF" macro to "SCATTERED_F"
        https://github.com/kvm-x86/linux/commit/9b2776c7cf2b
[55/57] KVM: x86: Explicitly track feature flags that require vendor enabling
        https://github.com/kvm-x86/linux/commit/0fea7aa2dc6a
[56/57] KVM: x86: Explicitly track feature flags that are enabled at runtime
        https://github.com/kvm-x86/linux/commit/ac9d1b7591a2
[57/57] KVM: x86: Use only local variables (no bitmask) to init kvm_cpu_caps
        https://github.com/kvm-x86/linux/commit/871ac338ef55

--
https://github.com/kvm-x86/linux/tree/next

Powered by blists - more mailing lists